Electronic apparatus

ABSTRACT

One embodiment relates to an electronic apparatus including a video processor and a video interface controller. The video processor transmits first uncompressed video data and high dynamic range (HDR) information in a first transmission format. The HDR information is associated with each video frame of the first uncompressed video data. The first transmission format includes a first non-blanking region in each video frame. The video interface controller receives the first uncompressed video data and the HDR information from the video processor in the first transmission format. The video interface controller transmits second uncompressed video data and the HDR information to an external device in a second transmission format. The second uncompressed video data corresponds to the first uncompressed video data. The second transmission format includes a second non-blanking region in each video frame, and the first non-blanking region is larger than the second non-blanking region.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority from Japanese Patent Application No.2015-205653 filed on Oct. 19, 2015, the entire contents of which areincorporated herein by reference.

FIELD

Embodiments described herein relate an electronic apparatus that enablesefficient transmission of data.

BACKGROUND

Among standards of multimedia interfaces between a video transmissiondevice and a video receiving device is the HDMI (high-definitionmultimedia interface; registered trademark). Video transmission deviceshaving an HDMI output terminal are called source devices and videoreceiving devices having an HDMI input terminal are called sink devices.Source devices are equipped with an HDMI LSI which functions as an HDMItransmission unit and a video processing LSI which outputs decoded videodata to the HDMI LSI. Sink devices are equipped with an HDMI receptionLSI and a video processing LSI for processing video data that is outputfrom the HDMI reception LSI and thereby generating a video signal to besupplied to a display device. Inside source devices and sink devices,the HDMI LSI and the video processing LSI are connected to each other bya prescribed interface and video data is exchanged through theinterface.

When information that is different from conventional video data comes tobe transmitted through the interface between an HDMI LSI and a videoprocessing LSI, it will be desired to transmit such informationefficiently.

BRIEF DESCRIPTION OF DRAWINGS

A general architecture that implements the various features of thepresent invention will now be described with reference to the drawings.The drawings and the associated descriptions are provided to illustrateembodiments and not to limit the scope of the present invention.

FIG. 1 shows the whole of an example data transmission system accordingto an embodiment, that is, an example manner of use of a reproductiondevice (transmission device) and a display device (receiving device)according to the embodiment.

FIG. 2 shows example configurations of the reproduction device and thedisplay device.

FIG. 3 shows an example transmission format used in the reproductiondevice and the display device according to the embodiment in a case thatauxiliary data is absent.

FIGS. 4A and 4B show example transmission formats used in thereproduction device and the display device according to the embodimentin a case that auxiliary data exists.

FIGS. 5A and 5B show other example transmission formats used in thereproduction device and the display device according to the embodimentin the case that auxiliary data exists.

FIG. 6 shows a further example transmission format used in thereproduction device and the display device according to the embodimentin the case that auxiliary data exists.

FIGS. 7A and 7B are flowcharts of processes that are executed by thereproduction device according to the embodiment.

FIGS. 8A and 8B are flowcharts of processes that are executed by thedisplay device according to the embodiment.

DETAILED DESCRIPTION

One embodiment relates to an electronic apparatus including a videoprocessor and a video interface controller. The video processortransmits first uncompressed video data and high dynamic range (HDR)information in a first transmission format. The HDR information isassociated with each video frame of the first uncompressed video data.The first transmission format includes a first non-blanking region ineach video frame. The video interface controller receives the firstuncompressed video data and the HDR information from the video processorin the first transmission format. The video interface controllertransmits second uncompressed video data and the HDR information to anexternal device in a second transmission format. The second uncompressedvideo data corresponds to the first uncompressed video data. The secondtransmission format includes a second non-blanking region in each videoframe, and the first non-blanking region is larger than the secondnon-blanking region.

An embodiment will be described with reference to the drawings.

FIG. 1 shows the whole of an example data transmission system accordingto the embodiment. In this data transmission system, a reproductiondevice 100 which is a source device and a display device 200 which is asink device are connected to each other by an HDMI cable 300.

Equipped with a disc drive 101, the reproduction device 100 decodescoded video data stored in an optical disc or the like and transmits thedecoded video data to the display device 200 over the HDMI cable 300.Equipped with a display unit 203, the display device 200 displays videousing the received video data.

FIG. 2 shows example configurations of the reproduction device 100 andthe display device 200. The reproduction device 100 is equipped with thedisc drive 101, a storage unit 102, a communication unit 103, a videoprocessing unit 104, and an HDMI transmission unit 105 which areimplemented as hardware circuits. In FIG. 2, each of the linesconnecting the individual units indicate an electric wire such asdedicated lines on a board, a standardized general-purpose communicationbus, or the like. The functions of part of those units, such as thevideo processing unit 104, may actually be implemented by software.However, even in such a case, it may be considered that such functionsare each implemented as a hardware circuit including a program storagememory and a CPU.

The disc drive 101 reads out coded video data stored in an optical discand outputs the read-out coded video data to the video processing unit104. The storage unit 102, which is a storage module such as an HDD oran SSD, stores coded video data recorded by the reproduction device 100and coded video data received over a network. The storage unit 102outputs stored coded video data to the video processing unit 104. Thecommunication unit 103, which is a transmitting/receiving unit forwireless LAN, wired LAN, mobile communication, etc., acquires, by acommunication, coded video data, examples of which are public codedvideo data on a public Internet site and coded video data that isprovided by a server of a VoD service. That is, the communication unit103 acquires coded video data that is stored in an external apparatus.The communication unit 103 outputs acquired coded video data to thevideo processing unit 104.

The video processing unit 104 generates uncompressed video data bydecoding received coded video data (compressed video data). The videoprocessing unit 104 may be a hardware decoder that is implemented as anLSI. Alternatively, where the reproduction device 100 is equipped with aCPU, the video processing unit 104 may be implemented in such a mannerthat the CPU reads a decoding program from a memory and runs it.

Video data that is generated by the video processing unit 104 may be inany of various formats as exemplified below. Example color space formatsare RGB (RGB 4:4:4), YCbCr 4:4:4, YCbCr 4:2:2, YCrCb 4:2:0. If YCbCr4:1:1 is established in the HDMI standard in the future, it may be usedin the video processing unit 104. The RGB format include formats inwhich the data amount of each R, G, or B element is 8 bits, 10 bits, 12bits, or 16 bits. The YCbCr 4:4:4, YCbCr 4:2:2, and YCrCb 4:2:0 formatseach include formats in which the data amount of each Y, Cb, or Crelement is 8 bits, 10 bits, 12 bits, or 16 bits.

Example resolution formats are 640×480, 1,280×720, 1,980×1,080,3,840×2,160, 4,090×2,160, and 7,680×4,320. Example frame rate formatsare 30 Hz, 50 Hz, and 60 Hz. The video processing unit 104 outputsgenerated video data to the HDMI transmission unit 105 via atransmission interface 110 in one of formats that will be describedlater with reference to FIGS. 3-6.

Where received coded video data includes auxiliary data such as HDR(high dynamic range) information of each video frame, the videoprocessing unit 104 outputs it to the HDMI transmission unit 105 in oneof the formats that will be described later with reference to FIGS.4A-6. The term “HDR information” as used herein means dynamic HDRinformation, not what is called static HDR information. That is, eachframe is associated with HDR information that conforms to the videocontent of the frame.

The HDMI transmission unit 105, which is such an LSI circuit, forexample, converts video body data and auxiliary data that are input fromthe video processing unit 104 via the transmission interface 110 into avideo signal of a prescribed transmission format and transmits thelatter to the display device 200 over the HDMI cable 300. The HDMItransmission unit 105 is equipped with a TMDS encoder for TMDS-encodingreceived video data, a microcomputer for communicating with an HDMIreceiving unit 201, etc. The TMDS encoder outputs encoded data torespective lines of channel 0 (CH0), channel 1 (CH1), and channel 2(CH2) of the HDMI interface.

The display device 200 is equipped with the HDMI receiving unit 201, avideo processing unit 202, and a display unit 203. The HDMI receivingunit 201, which is an LSI, receives a video signal from the reproductiondevice 100. The HDMI receiving unit 201 converts the received videosignal into video data of one of the formats that will be describedlater with reference to FIGS. 3-6, and transmits the latter to the videoprocessing unit 202 via a transmission interface 210. The HDMI receivingunit 201 is equipped with a TMDS decoder for TMDS-decoding receivedvideo data received from the respective lines of channel 0 (CH0),channel 1 (CH1), and channel 2 (CH2), a microcomputer for communicatingwith the HDMI transmission unit 105, etc.

The video processing unit 202 converts video data that is input from theHDMI receiving unit 201 into a video signal that is in such a format asto be displayable by the display unit 203, and outputs the latter to thedisplay unit 203. The display unit 203 displays video using the receivedvideo signal.

FIGS. 3-6 show example formats that are used for transmission from thevideo processing unit 104 to the HDMI transmission unit 105 andtransmission from the HDMI receiving unit 201 to the video processingunit 202.

FIG. 3 shows an example format for transmission of RGB video data of3,840×2,160 pixels (horizontal/vertical) and 30 Hz without auxiliarydata such as HDR information. The video processing unit 104 transmitsdata including video regions and blanking regions. The video region hasa size of 3,840×2,160 pixels (horizontal/vertical) and containsone-frame video data. Although the example formats shown in FIGS. 3-6will be described with an assumption that the video data is RGBuncompressed video data, the video data may be uncompressed video dataof YCbCr 4:4:4, YCbCr 4:2:2, YCrCb 4:2:0, or YCbCr 4:1:1.

The vertical blanking region has a width of 90 lines in the verticaldirection and the horizontal blanking region has a width of 560 pixelsin the horizontal direction. A vertical sync code for verticalsynchronization is buried in a particular region of the verticalblanking region and, likewise, a horizontal sync code for horizontalsynchronization is buried in a particular region of the horizontalblanking region.

The format of FIG. 3 is also used for transmission of video data fromthe HDMI transmission unit 105 to the HDMI receiving unit 201. The HDMItransmission unit 105 transmits auxiliary data such as HDR informationaccording to the existing HDMI standard or a new version of it to beestablished in the future. According to such an HDMI standard, auxiliarydata is buried in, for example, a blanking region, empty bits of videodata, any of other kinds of regions. Where HDR information is buried ina blanking region, the HDMI receiving unit 201 detects the auxiliarydata using an identifier buried in its header and then extracts theauxiliary data. Information for control of the display device 200, audiodata, InfoFrame for notification of the format of video data beingtransmitted, etc. are buried in the blanking regions.

FIG. 4A shows an example format that is employed in a case thatauxiliary data is transmitted. The HDMI transmission unit 105 transmitsdata including video regions and blanking regions. The non-blankingregion has a size of 3,840×(2,160+n) pixels (horizontal/vertical) andcontains video body data and auxiliary data. Whereas in the HDMIstandard the vertical blanking region has a width of 90 lines in thevertical direction and a width of 4,400 pixels in the horizontaldirection, in the format auxiliary data is located in part of thoselines, that is, a prescribed number n of lines that are upstream of andimmediately adjacent to the video data lines. That is, a region of nlines×3,840 pixels is assigned for auxiliary data.

In other words, whereas in the 4K2K@30 Hz RGB format the number ofvertical blanking lines is equal to 90, in the format of FIG. 4A thevideo processing unit 104 (or HDMI receiving unit 201) communicates withthe HDMI transmission unit 105 (or video processing unit 202) prior to avideo transmission and thereby shares the information relating to theformat of FIG. 4A with the latter. That is, one of the video processingunit 104 (or HDMI receiving unit 201) and the HDMI transmission unit 105(or video processing unit 202) notifies the other of the fact that thenumber of vertical blanking lines is equal to 90−n or smaller than usualby n, whereby the size of the vertical blanking region is adjusted.

As mentioned above, an example of auxiliary data is HDR (high dynamicrange) information of each video frame. That is, in the format of FIG.4A, for example, HDR information to be used for setting the video offrame 1 in a high contrast state is located immediately before the videodata of frame 1 and HDR information to be used for setting the video offrame 2 in a high contrast state is located immediately before the videodata of frame 2. However, when data of this format is processed on thetransmission side or the reception side, there may occur an event thatprocessing on auxiliary data located immediately before certain videobody data is not completed before the video body data is processedcompletely. In view of this, auxiliary data may be paired with a videoframe that precedes the video frame corresponding to the auxiliary data.That is, auxiliary data of frame (n−α) may be located immediately beforevideo body data of frame n.

FIG. 4B shows another example format that is employed in the case thatauxiliary data is transmitted. In this format, auxiliary data is locatedin a prescribed number n of lines that are downstream of and immediatelyadjacent to the video data lines.

FIGS. 5A and 5B show other example formats that are employed in the casethat auxiliary data is transmitted. In the format of FIG. 5A, auxiliarydata is located in part of the horizontal blanking region of the HDMIstandard, that is, a prescribed number m of pixels that are upstream of(i.e., on the left of) and immediately adjacent to the video datapixels. That is, a region of 2,160 lines×m pixels is assigned forauxiliary data.

In the format of FIG. 5B, auxiliary data is located in a prescribednumber m of pixels that are downstream of (i.e., on the right of) andimmediately adjacent to the video data pixels.

FIG. 6 shows a further example format that is employed in the case thatauxiliary data is transmitted. In this format, the blanking regions arenot reduced and, instead, the non-blanking region is expanded by nlines. As a result, the number of lines per frame of the combined regionof the blanking regions and the non-blanking region is increased by n.Auxiliary data is located in the non-blanking region.

Although in the format of FIG. 6 auxiliary data is located immediatelyupstream of the video data, auxiliary data may be located immediatelydownstream of the video data. The size of the non-blanking region may beincreased in the horizontal direction rather than the verticaldirection. In this case, as in the formats of FIGS. 5A and 5B, auxiliarydata is located in m pixels that are immediately upstream of (i.e., onthe left of) or immediately downstream of (i.e., on the right of) thevideo data pixels. Furthermore, although the format of FIG. 6 has theblanking regions, another format is possible in which each frame isformed by only a non-blanking region, that is, has no blanking regions.

FIGS. 7A and 7B are flowcharts of processes that are executed by thereproduction device 100. More specifically, FIG. 7A is a flowchart of aprocess that is executed by the video processing unit 104 intransmitting video data to the HDMI transmission unit 105. And FIG. 7Bis a flowchart of a process that is executed by the HDMI transmissionunit 105 in receiving video data from the video processing unit 104 andtransmitting it to the display device 200.

In the process of FIG. 7A, first, at step S701, the video processingunit 104 communicates with the HDMI transmission unit 105 and therebydetermines a format to be used for transmitting video data. If the videodata includes auxiliary data, the video processing unit 104 employs oneof the formats of FIGS. 4A-6 as a transmission format.

If the video data includes auxiliary data (S702: yes), the videoprocessing unit 104 arranges the auxiliary data and the video body dataaccording to the determined format at steps S703 and S704 and transmitsresulting data to the HDMI transmission unit 105 at step S705. On theother hand, if the video data includes no auxiliary data (S702: no), thevideo processing unit 104 arranges the video body data according to theformat of FIG. 3 at step S706 and transmits resulting data at step S705.

In the process of FIG. 7B, first, at step S710, the HDMI transmissionunit 105 communicates with the video processing unit 104 and therebydetermines a format to be used for receiving video data. As mentionedabove, if the video data includes auxiliary data, the HDMI transmissionunit 105 employs one of the formats of FIGS. 4A-6 as a transmissionformat. The HDMI transmission unit 105 also determines a format to beused for transmitting the data to the display device 200 over the HDMIcable 300 by reading EDID from the HDMI receiving unit 201 (this stepwill not be described in detail here).

After the determination of the format, at step S711, the videoprocessing unit 104 starts transmitting video data and the HDMItransmission unit 105 starts receiving it. If video data includingauxiliary data is being received (S712: yes), the HDMI transmission unit105 extracts the auxiliary data and the video body data from the data ofthe determined format at steps S713 and S714. At step S715, the HDMItransmission unit 105 arranges the auxiliary data and the video bodydata according to the format of FIG. 3. At step S716, the HDMItransmission unit 105 transmits resulting data to the display device 200over the HDMI cable 300.

On the other hand, if the video data being received includes noauxiliary data (S712: no), at step S717 the HDMI transmission unit 105receives data in which video body data is arranged according to theformat of FIG. 3 and extracts the video body data from the receiveddata. At step S718, the HDMI transmission unit 105 arranges theextracted video body data again according to the format of FIG. 3. Atstep S716, the HDMI transmission unit 105 transmits resulting data tothe display device 200 over the HDMI cable 300.

FIGS. 8A and 8B are flowcharts of processes that are executed by thedisplay device 200. More specifically, FIG. 8A is a flowchart of aprocess that is executed by the HDMI receiving unit 201 in receivingvideo data from the reproduction device 100 and transmitting it to thevideo processing unit 202. And FIG. 8B is a flowchart of a process thatis executed by the video processing unit 202 in receiving video datafrom the HDMI receiving unit 201 and displaying it on the display unit203.

In the process of FIG. 8A, at step S801, the HDMI receiving unit 201receives data that is transmitted from the HDMI transmission unit 105 inthe format of FIG. 3 and extracts various data such as auxiliary data(if it exists), video body data, etc. from the received data. At stepS802, the HDMI receiving unit 201 communicates with the video processingunit 202 and thereby determines a format to be used for transmitting thevideo data to the video processing unit 202.

If the video data includes auxiliary data, the HDMI receiving unit 201employs one of the formats of FIGS. 4A-6 as a transmission format. StepsS801 and S802 may be executed in the opposite order; for example, theHDMI receiving unit 201 may judge, for example, whether or not the datareceived from the HDMI transmission unit 105 includes auxiliary data byanalyzing InfoFrame that is buried in the received data and determine,according to an analysis result, a format to be used for a transmissionbetween itself and the video processing unit 202.

If the video data includes auxiliary data (S803: yes), the HDMIreceiving unit 201 arranges extracted auxiliary data and video body dataaccording to the determined format at steps S804 and S805 and transmitsresulting data at step S806. On the other hand, if the video dataincludes no auxiliary data (S803: no), the HDMI receiving unit 201arranges extracted video body data according to the format of FIG. 3 atstep S807 and transmits resulting data at step S806.

In the process of FIG. 8B, first, at step S810, the video processingunit 202 communicates with the HDMI receiving unit 201 and therebydetermines a format to be used for receiving video data. As mentionedabove, if the video data includes auxiliary data, the video processingunit 202 employs one of the formats of FIGS. 4A-6 as a transmissionformat. After the determination of the format, at step S811, the HDMIreceiving unit 201 starts transmitting video data and the videoprocessing unit 202 starts receiving it.

If video data including auxiliary data is being received (S812: yes),the video processing unit 202 extracts the auxiliary data and the videobody data from the data of the determined format at steps S813 and S814.At step S815, the video processing unit 202 generates a video signalusing the extracted auxiliary data and video body data and outputs thegenerated video signal to the display unit 203 to cause it to displaythe video signal. If the auxiliary data is HDR information of eachframe, the video processing unit 202 generates, using the video databody and the HDR information, a video signal that is higher in contrastthan one that is generated using only the video body data.

On the other hand, if the video data being received includes noauxiliary data (S812: no), at step S816 the video processing unit 202receives data in which video body data is arranged according to theformat of FIG. 3 and extracts the video body data from the receiveddata. At step S817, the video processing unit 202 generates a videosignal using the extracted video body data and outputs the generatedvideo signal to the display unit 203 to cause it to display the videosignal.

In the examples of FIGS. 4A and 4B, to transmit video data includingauxiliary data, adjustments are made on the transmission side and thereception side so as to perform a transmission in a format in which thesize of the vertical blanking region is reduced and the auxiliary datais transmitted in this format. On the other hand, in the example of FIG.6, auxiliary lines are added to the lines for transmission of video bodydata and auxiliary data is transmitted using these auxiliary lines. Inthis case, synchronization for the video body data and the auxiliarydata can be made on the reception side by burying a vertical sync codeand a horizontal sync code in the auxiliary data to be transmitted usingthe auxiliary lines.

Although the embodiment has been described above, it is just an exampleand should not be construed as restricting the scope of the invention.The embodiment may be practiced in various other forms, and part of itmay be omitted, replaced by other elements, or changed in variousmanners without departing from the spirit and scope of the invention.Such modifications will also fall within the scope of the invention.

The invention claimed is:
 1. An electronic apparatus comprising: a videoprocessor configured to: transmit first uncompressed video data and highdynamic range (HDR) information in a first transmission format, the HDRinformation being associated with each video frame of the firstuncompressed video data, the first transmission format comprising afirst non-blanking region in each video frame; and a video interfacecontroller configured to: receive the first uncompressed video data andthe HDR information from the video processor in the first transmissionformat; and transmit second uncompressed video data and the HDRinformation to an external device in a second transmission format, thesecond uncompressed video data corresponding to the first uncompressedvideo data, the second transmission format comprising a secondnon-blanking region in each video frame, the first non-blanking regionbeing larger than the second non-blanking region.
 2. The electronicapparatus of claim 1, wherein the first uncompressed video data and theHDR information are included in the first non-blanking region.
 3. Theelectronic apparatus of claim 2, wherein the first transmission formathas a first blanking region and the first non-blanking region in eachvideo frame, wherein the second transmission format has a secondblanking region and the second non-blanking region in each video frame,and wherein the number of lines or the number of horizontal pixels in acombined region of the first blanking region and the first non-blankingregion is the same as that of a combined region of the second blankingregion and the second non-blanking region.
 4. The electronic apparatusof claim 3, wherein each of the first blanking region and the secondblanking region comprises a vertical blanking region, and wherein thenumber of lines in the vertical blanking region of the secondtransmission format is larger than that of the first transmissionformat.
 5. The electronic apparatus of claim 3, wherein each of thefirst blanking region and the second blanking region comprises ahorizontal blanking region, and wherein the number of horizontal pixelsin the horizontal blanking region of the second transmission format islarger than that of the first transmission format.
 6. The electronicapparatus of claim 3, wherein, in the first transmission format, the HDRinformation is located in a region that corresponds to the secondblanking region of the second transmission format.
 7. The electronicapparatus of claim 3, wherein, in the first transmission format, a partof the HDR information is located in a region that corresponds to thesecond blanking region of the second transmission format.
 8. Theelectronic apparatus of claim 2, wherein the first transmission formathas the same blanking regions as the second transmission format does, orhas no blanking regions.
 9. An electronic apparatus comprising: a videointerface controller configured to: receive first uncompressed videodata and high dynamic range (HDR) information from an external device ina first transmission format, the HDR information being associated witheach video frame of the first uncompressed video data, the firstuncompressed video data comprising a first non-blanking region in eachvideo frame; and transmit second uncompressed video data and the HDRinformation in a second transmission, the second uncompressed video datacorresponding to the first uncompressed video data, the secondtransmission format comprising a second non-blanking region in eachvideo frame, the first non-blanking region being larger than the secondnon-blanking region; and a video processor configured to: receive thesecond uncompressed video data and the HDR information from the videointerface processor in the second transmission format; and generate avideo signal using the second uncompressed video data and the HDRinformation.
 10. The electronic apparatus of claim 9, wherein the firstuncompressed video data and the HDR information are included in thefirst non-blanking region.
 11. The electronic apparatus of claim 10,wherein the first transmission format has a first blanking region andthe first non-blanking region in each video frame, wherein the secondtransmission format has a second blanking region and the secondnon-blanking region in each video frame, and wherein the number of linesor the number of horizontal pixels in a combined region of the firstblanking region and the first non-blanking region is the same as that ofa combined region of the second blanking region and the secondnon-blanking region.
 12. The electronic apparatus of claim 11, whereineach of the first blanking region and the second blanking regioncomprises a vertical blanking region, and wherein the number of lines inthe vertical blanking region of the second transmission format is largerthan that of the first transmission format.
 13. The electronic apparatusof claim 11, wherein each of the first blanking region and the secondblanking region comprises a horizontal blanking region, and wherein thenumber of horizontal pixels in the horizontal blanking region of thesecond transmission format is larger than that of the first transmissionformat.
 14. The electronic apparatus of claim 11, wherein, in the firsttransmission format, the HDR information is located in a region thatcorresponds to the second blanking region of the second transmissionformat.
 15. The electronic apparatus of claim 11, wherein, in the firsttransmission format, a part of the HDR information is located in aregion that corresponds to the second blanking region of the secondtransmission format.
 16. The electronic apparatus of claim 10, whereinthe first transmission format has the same blanking regions as thesecond transmission format does, or has no blanking regions.
 17. A videoprocessing method, comprising: transmitting, by a video processor, firstuncompressed video data and high dynamic range (HDR) information in afirst transmission format, the HDR information being associated witheach video frame of the first uncompressed video data, the firsttransmission format comprising a first non-blanking region in each videoframe; receiving, by a video interface controller, the firstuncompressed video data and the HDR information in the firsttransmission format; and transmitting, by the video interfacecontroller, second uncompressed video data and the HDR information to anexternal device in a second transmission format, the second uncompressedvideo data corresponding to the first uncompressed video data, thesecond transmission format comprising a second non-blanking region ineach video frame, the first non-blanking region being larger than thesecond non-blanking region.
 18. A video processing method, comprising:receiving, by a video interface controller, receive first uncompressedvideo data and high dynamic range (HDR) information from an externaldevice in a first transmission format, the HDR information beingassociated with each video frame of the first uncompressed video data,the first uncompressed video data comprising a first non-blanking regionin each video frame; transmitting, by the video interface controller,second uncompressed video data and the HDR information in a secondtransmission, the second uncompressed video data corresponding to thefirst uncompressed video data, the second transmission format comprisinga second non-blanking region in each video frame, the first non-blankingregion being larger than the second non-blanking region; receiving, by avideo processor, the second uncompressed video data and the HDRinformation in the second transmission format; and generating, by thevideo processor, a video signal using the second uncompressed video dataand the HDR information.